fix some mixed space+tab indentation

This fixes all instances of " \t" in the code base. Most common case
seems to be after a "where" line; probably vim copied the two space layout
of that line.

Done as a background task while listening to episode 2 of the Type Theory
podcast.

Utility/Quvi.hs

@@ -113,7 +113,7 @@ supported Quvi04 url = boolSystem "quvi"
 supported Quvi09 url = (firstlevel <&&> secondlevel)
 		`catchNonAsync` (\_ -> return False)
   where
-  	firstlevel = case uriAuthority =<< parseURIRelaxed url of
+	firstlevel = case uriAuthority =<< parseURIRelaxed url of
 		Nothing -> return False
 		Just auth -> do
 			let domain = map toLower $ uriRegName auth